PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-20:27:50
G07     29.2           69.4               12.9 +/-    0.53      13.7 +/-    0.53  0.060 / 0.060
G08     60.6           48.7               12.7 +/-    0.72      16.3 +/-    0.72  0.050 / 0.050
G09     179.9          44.6               16.8 +/-    0.66      22.8 +/-    0.66  0.280 / 0.340
G11     127.9          30.3               15.4 +/-    1.28      26.8 +/-    1.28  0.280 / 0.570
G18     110.8          12.9               15.1 +/-    2.56      39.5 +/-    2.56  0.030 / 0.040
G23     159.3          11.4               19.0 +/-    3.04      51.5 +/-    3.04  0.040 / 0.040
G27     38.5           12.4               10.3 +/-    2.20      27.3 +/-    2.20  0.130 / 0.450
G28     266.4          49.2               13.4 +/-    4.55      17.0 +/-    4.55  0.160 / 0.310
G30     328.2          56.8               12.4 +/-    0.44      14.5 +/-    0.44  0.030 / 0.030